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Topography growth drives stress rotations in the central Andes: 3 Observations and models

Heidbach, Oliver, Giampiero Iaffaldano, and Hans-Peter Bunge (2008), Topography growth drives stress rotations in the central Andes: 3 Observations and models, GEOPHYSICAL RESEARCH LETTERS, 35(8), doi:10.1029/2007GL032782.

Abstract
Recent numerical models that couple global mantel circulation with lithosphere dynamics show that growth of the central Andes controls the 30% reduction of convergence velocity between the Nazca and South America plates observed over the past 10 Ma. The increase of gravitational potential energy due to topographic growth is also a major control on the stress pattern. Here we use numerical models which reproduce the Nazca/South America convergence history to predict the change of stress pattern in the central Andes for the past 10 Ma. Comparing the modeled stress orientations at present-day with observed ones results in ±23.9° mean deviation. Based on this good agreement we attempt to predict paleostress orientations 10 Ma ago. Interestingly, the modeled stress orientations 3.2 Ma ago are very similar to the present-day orientations. From this result we infer that stress rotations occurred between 10 and 3.2 Ma ago, when topography was considerably lower. Citation: Heidbach, O., G. Iaffaldano, and H.-P. Bunge (2008), Topography growth drives stress rotations in the central Andes: Observations and models, Geophys. Res. Lett., 35, LXXXXX, doi:10.1029/2007GL032782.
BibTeX
@article{id1261,
  author = {Oliver Heidbach and Giampiero Iaffaldano and Hans-Peter Bunge},
  journal = {GEOPHYSICAL RESEARCH LETTERS},
  month = {apr},
  number = {8},
  title = {{Topography growth drives stress rotations in the central Andes: 3 Observations and models}},
  volume = {35},
  year = {2008},
  language = {en},
  doi = {10.1029/2007GL032782},
}
EndNote
%0 Journal Article
%A Heidbach, Oliver 
%A Iaffaldano, Giampiero
%A Bunge, Hans-Peter
%D 2008
%N 8
%V 35
%J GEOPHYSICAL RESEARCH LETTERS
%T Topography growth drives stress rotations in the central Andes: 3 Observations and models
%8 apr
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Printed 25. Aug 2019 09:55